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High Engine Hours

VexatiousGlove
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VexatiousGlove New Member

VexatiousGlove

Posted
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Looking at a used 2019 Sierra Denali. It only has about 40000 miles. But it has 3400 engine hours which seems a little extreme. Service records indicate oil changes at 5-10k intervals. Not feeling confident in that. The price is good though. No accidents, no frame rust.

 

The engine hours with the service intervals is a pretty huge red flag to me though. Curious to see what you guys would do if looking at a truck with that kind of hours on it.

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KARNUT
KARNUT

My son worked at the family business one year as an apprentice. He hated it. My daughter worked as a secretary, same results. After graduating my son started selling timeshare. His first year he was m

diyer2
diyer2

VERY FEW with a degree impresses me. 

CamGTP
CamGTP

Pretty easy for a work truck to get that many hours on it. The boss man or contractor could have let it idle for long periods of time while on a jobsite.   My work truck has 192,000+ miles o

Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
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I have 165K on my 2015 and has 3,900 hours clocked. That is a sick amount of idle time. 😱

 

Add service intervals approaching 1.5X the books 'normal' service on a vehicle clearly on the 'severe' schedule. They could give it to me, and I don't think I would let it sit in my driveway. :idiot:

 

Yesh! YMMV :rolleyes:

 

CamGTP Senior Enthusiast

CamGTP

Posted
Posted

Pretty easy for a work truck to get that many hours on it. The boss man or contractor could have let it idle for long periods of time while on a jobsite.

 

My work truck has 192,000+ miles on it but over 5,000hrs. Like here in the winter if it's below 5 degrees outside I rarely shut it off, it may run for 8 hours straight. The fleet service does 20k mile oil changes too lol, but it is a Cummins engine with lots more oil capacity.

 

If it came with an extended powertrain warranty, might be worth it.

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VexatiousGlove New Member

VexatiousGlove

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Thanks I’m going to pass on it. The service intervals are just way too sketchy for the amount of hours on it.

 

That’s probably why it’s been sitting at the dealer for so long. GM displays the engine hours by default, very noticeable. I had to do a double take when I saw 3400.

swathdiver Senior Enthusiast

swathdiver

Posted
Posted

That's an average speed of about 11.76 MPH.  That's 100% city driving according to government standards.

 

If the motor runs good and they took my low ball offer...

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newdude Senior Enthusiast

newdude

Posted
Posted (edited)

In terms of hours to miles on that engine, WELL over 100k on it.  

 

GM has a standard conversion factor they use of hours X 33mi/hr average speed for approximating if a vehicle has low or high idle time.  3400 x 33mi/hr = 112,200mi worth of run time.  That is A LOT of idling.  Like cop car levels of idling.      

 

The DIC might even have it broken down too as I think the 19-22 trucks with the uplevel clusters it can show driving hours and idle hours broken down.  

Edited by newdude
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swathdiver Senior Enthusiast

swathdiver

Posted
Posted
9 hours ago, newdude said:

In terms of hours to miles on that engine, WELL over 100k on it.  

 

GM has a standard conversion factor they use of hours X 33mi/hr average speed for approximating if a vehicle has low or high idle time.  3400 x 33mi/hr = 112,200mi worth of run time.  That is A LOT of idling.  Like cop car levels of idling.      

 

The DIC might even have it broken down too as I think the 19-22 trucks with the uplevel clusters it can show driving hours and idle hours broken down.  

On the flip side, the transmission and rest of the drivetrain will be like new!  

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GETGONE Enthusiast

GETGONE

Posted
Posted

But does it account for the "auto stop/start"? Is it technically "running" if the auto stop is engaged but the engine isn't running?

redwngr Senior Enthusiast

redwngr

Posted
Posted

Revolutions per hour are much less idling vs running 65 or 70 down the highway. 

 

Still, I'd want to know if it's 4 oil changes (40,000 / 10,000) or if it's 8 oil changes (40,000 / 5,000) 

 

 

Is it at a dealer?

Any sort of 'warranty' ?

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newdude Senior Enthusiast

newdude

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11 hours ago, GETGONE said:

But does it account for the "auto stop/start"? Is it technically "running" if the auto stop is engaged but the engine isn't running?

 

 

Auto Stop/Start only runs for say 30 seconds - 1 minute if the correct conditions are met in the ECM.  If its in a stop and go driving scenario, it will disable it until the conditions are met again for stop/start.  You won't see a message on the dash, but rather, the internal timing of the system in the ECM keeps track.  So that "off" time is like 0.001% factor here.  

 

 

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Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
Posted
13 hours ago, redwngr said:

Revolutions per hour are much less idling vs running 65 or 70 down the highway. 

 

Still, I'd want to know if it's 4 oil changes (40,000 / 10,000) or if it's 8 oil changes (40,000 / 5,000) 

 

 

Is it at a dealer?

Any sort of 'warranty' ?

 

33 mph in top gear is idling:rollin: Ya Tee'd it up....I had to swing at it. :crackup:

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redwngr Senior Enthusiast

redwngr

Posted
Posted
1 hour ago, Grumpy Bear said:

 

33 mph in top gear is idling:rollin: Ya Tee'd it up....I had to swing at it. :crackup:

34000/800 is 42.5 mph average.

 

So what does that 42.5 mph average mean (other than it's about the same as 165,000/3900)??

Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
Posted
9 hours ago, redwngr said:

34000/800 is 42.5 mph average.

 

So what does that 42.5 mph average mean (other than it's about the same as 165,000/3900)??

 

He said 40,000 miles and 3,400 hours. 11.76 mph. It was just a funny. Meant nothing by it other than a laugh. 

VexatiousGlove New Member

VexatiousGlove

Posted
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Posted (edited)
On 4/14/2023 at 8:39 PM, redwngr said:

Revolutions per hour are much less idling vs running 65 or 70 down the highway. 

 

Still, I'd want to know if it's 4 oil changes (40,000 / 10,000) or if it's 8 oil changes (40,000 / 5,000) 

 

 

Is it at a dealer?

Any sort of 'warranty' ?


It was at a dealer with good reviews. No warranty and they didn’t seem concerned about the hours vs service intervals. I don’t have the carfax anymore but it was oil change at 7k, 16k then 26k then a service at 35k and one that the dealer did before selling the truck at 40k that didn’t mention an oil change.

 

No warranty offered.

Edited by VexatiousGlove

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